522142447 has 4 divisors (see below), whose sum is σ = 525600496. Its totient is φ = 518684400.

The previous prime is 522142417. The next prime is 522142451. The reversal of 522142447 is 744241225.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-522142447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522142417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1728798 + ... + 1729099.

It is an arithmetic number, because the mean of its divisors is an integer number (131400124).

Almost surely, 2^522142447 is an apocalyptic number.

522142447 is a deficient number, since it is larger than the sum of its proper divisors (3458049).

522142447 is a wasteful number, since it uses less digits than its factorization.

522142447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3458048.

The product of its digits is 17920, while the sum is 31.

The square root of 522142447 is about 22850.4364728554. The cubic root of 522142447 is about 805.2480220291.

The spelling of 522142447 in words is "five hundred twenty-two million, one hundred forty-two thousand, four hundred forty-seven".